/**
 * @param {number[]} nums
 * @param {number} lower
 * @param {number} upper
 * @return {string[]}
*/
var findMissingRanges = function(nums, lower, upper) {
  let result = [], j = 0;
  while(nums[j])
  for(let i = lower; i <= upper; i++) {
    result.push(i);
  }
};
let nums = [0, 1, 3, 50, 75], lower = 0, upper = 99;
console.log(findMissingRanges(nums, lower, upper));
